Update styles and move into a single file.
Add `tagline` attribute to Account model.
Include `tagline` attribute in serializer.
Add controller and service for profile page and include.
Change url structure from /accounts/:id to /accounts/:user__username. Start working on list view for the Thoughts related to an Account.
Add method to Thoughts service for retrieve Thoughts given a username.
Make a Thoughts username link to that accounts profile.